间接插层法合成三聚氰胺/G-C3N4共价有机骨架及其阻燃剂

Liqin Shen, Boqiang Xu, Hengming Hu, Zichun Lv, L. Ben
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摘要

本文首先设计了一种基于g-C3N4的共价有机骨架。COF是通过三聚氰胺和g-C3N4之间的间接相互关系方法排列的。在反应过程中,Cu2+被用来扩大g-C3N4的层空间。通过SEM、TEM、FTIR和XRD对所制备的COF进行了表征。所获得的产物是具有COF结构的三聚氰胺相互作用的g-C3N4复合材料(MCN)。MCN被用作电缆护套材料的阻燃剂。测试了含有MCN的链路护套材料的热稳定性、热收缩性、氧记录和垂直燃烧性能。结果表明,MCN阻燃剂使护套材料的热稳定时间从89min增加到131min,热收缩率从4.17%降低到2.00%,LOI为29.5,阻燃等级达到UL-94V-0。对电缆护套材料燃烧后的碳残留物进行SEM分析发现,在MCN阻燃剂的影响下,连接护套材料的碳层状态转变为厚蜂窝结构,阻止了氧气和可燃气体的扩散,从而阻碍了火焰的传播。
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Facile Synthesis of Melamine/G-C3N4 Covalent Organic Framework (COF) by Indirect Intercalation and Its Flame Retardant
In this paper, a covalent organic framework (COF) based on g-C3N4 was designed firstly. The COF is arranged through an indirect interrelation method among melamine and g-C3N4. During the reaction, Cu2+ was used to expand the layer space of g-C3N4. The as-prepared COF were characterized by SEM, TEM, FTIR, and XRD. The obtained product is a melamine interrelation g-C3N4 composite material (MCN) with COF structure. The MCN was used as flame retardant for cable sheath material. The thermal stability, thermal shrinkage, oxygen record and vertical burning of link sheath material contain MCN were tested. The results showed that the MCN flame retardant increases the thermal stability time of the sheath material from 89 min to 131 min, and the thermal shrinkage rate diminished from 4.17% to 2.00%. The LOI is 29.5, and the flame retardant grade reaches UL-94 V-0. The SEM analysis of the carbon residue of the cable sheath material after burning, it was found that the state of the carbon layer of the link sheath material transform into a thick honeycomb structure by the impact of the MCN flame retardant, which forestalls the dispersion of oxygen and burnable gases, in this way hindering the transmission of flame.
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来源期刊
Journal of Biobased Materials and Bioenergy
Journal of Biobased Materials and Bioenergy 工程技术-材料科学:生物材料
自引率
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发文量
60
审稿时长
6 months
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